机械行业中有许多面积大、形状复杂的加工面，对其进行亚微米级精度、全场、高速测量是机械工业向高、精、尖发展的关键技术瓶颈之一。目前，国际上唯一能实现大面积、复杂机械加工面在线、高速、全场测量的是“多步变波长全息干涉测量”技术，但其还存在测量范围小、稳定性差和非常昂贵等缺点，难以推广应用。本项目提出研究一种“连续变角度全息干涉测量”新原理，该原理对待测信息单点独立提取、“无需相位去包裹”、可以对任意复杂形状加工面进行全场、高速、亚微米精度测量。项目将探明这种新思想的信息解调原理和方法、各种影响因素对测量精度的影响规律，建立测量系统原型样机，为实际推广应用打下基础。项目提出的新方法克服了现有的两种光学干涉信息解调法（“相移法”和“变波长法”）的缺点，具有测量范围大、测量稳定、成本低等优势，适宜大面积推广应用，将为机械、航空航天等行业提供一种先进的测试方法和技术，具有重要的理论和实际意义。

Large and complex surfaces often exist in mechanical machining. Knowing the answer of how to measure this kind of surface with sub-micron precision, full field and high speed can promote the mechanical machinning to the next level of high-grade, precision and advanced development. The current technique, “multi-wavelength holographic interference measuring technique”,is the only disclosed technique which can achieve the high-speed, full-field and sub-micron measurement. But it still has some limits such as small measurement range, low stability, complicated structure and high cost. So this technique is hard to be fully applied. In this project we present a technique with a new principle-- “continuous multi-angle holographic interference measurement”. The measuring information extraction in this new technique is single-point independence. It can measure the complex shape with high speed, full field and sub-micron precision without phase unwrapping. In this project, we will ascertain the information demodulation principle of this new technique and the influence of various factors on the measuring accuracy. A prototype measurement system will be built to validate the proposed principle and method, which will lay a solid foundation for the practical promotion and application. The proposed research will overcome the defect of the current Information demodulation methods of optical interference (Phase-shifting holography and Multi-Wavelength holography). The proposed research will promote the key break through in measurement range, stability and cost effective and is more suitable for wide range application. The research results will bring a advanced method for mechanical and other related industry. The theoretical and practical significance of the research will be important.